<template>
  <div>

    <div style="padding: 10px 0">
      <el-input style="width: 200px" placeholder="请输入文件名" suffix-icon="el-icon-search" v-model="name"></el-input>
      <el-button class="ml-5" type="primary" @click = "load">搜索</el-button>
    </div>

    <div class="pd-10">
      <el-upload action="http://localhost:8081/file/upload" :show-file-list="false" accept="xlsx" :on-success="handleFile" style="display: inline-block">
        <el-button type="primary" class="ml-5">上传文件<i class="el-icon-top"></i></el-button>
      </el-upload>
      <el-popconfirm
          class="ml-5"
          confirm-button-text='确定'
          cancel-button-text='取消'
          icon="el-icon-info"
          icon-color="red"
          title="确定删除吗？"
          @confirm="deleteBatch"
      >
        <el-button type="danger" slot="reference">批量删除<i class="el-icon-remove-outline"></i></el-button>
      </el-popconfirm>
    </div>
    <el-table :data="tableData" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" ></el-table-column>
      <el-table-column prop="id" label="ID" width="80"></el-table-column>
      <el-table-column prop="name" label="文件名称"></el-table-column>
      <el-table-column prop="type" label="文件类型"></el-table-column>
      <el-table-column prop="size" label="文件大小（KB）"></el-table-column>
      <el-table-column label="下载" width="210">
        <template slot-scope="scope">
          <el-button type="primary" @click="download(scope.row.url)">下载</el-button>
        </template>
      </el-table-column>
      <el-table-column label="启用">
        <template slot-scope="scope">
          <el-switch v-model="scope.row.enable" active-color="#13ce66" inactive-color="#ccc" @change="changeEnable(scope.row)"></el-switch>
        </template>
      </el-table-column>
      <el-table-column label="操作" width="200" align="center">
        <template slot-scope="scope">
          <el-popconfirm
              class="ml-5"
              confirm-button-text='确定'
              cancel-button-text='取消'
              icon="el-icon-info"
              icon-color="red"
              title="确定删除吗？"
              @confirm="deleteForm(scope.row.id)"
          >
            <el-button type="danger" slot="reference">删除<i class="el-icon-remove-outline"></i></el-button>
          </el-popconfirm>
        </template>
      </el-table-column>
    </el-table>
    <div style="padding: 10px 0">
      <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page="pageNum"
          :page-sizes="[5, 10, 15, 20]"
          :page-size="pageSize"
          layout="total, sizes, prev, pager, next, jumper"
          :total="total">
      </el-pagination>
    </div>
  </div>
</template>

<script>
export default {
  name: "File",
  data() {
    return {
      tableData: [],
      pageNum: 1,
      pageSize: 10,
      total: 0,
      name: '',
      multipleSelection: [],
      file: {},
    }
  },
  created() {
    this.load();
  },
  methods: {
    load() {
      this.request.get("/file/page", {
        params: {
          pageNum: this.pageNum,
          pageSize: this.pageSize,
          name: this.name,
        }
      }).then(res => {
        this.tableData = res.data.records;
        this.total = res.data.total;
      });
    },
    deleteForm(id) {
      this.request.delete("/file/" + id).then(res => {
        if(res.data) {
          this.$message.success(res.message);
          this.load();
        }else {
          this.$message.error(res.message);
        }
      });
    },
    deleteBatch() {
      if(this.multipleSelection.length == 0){
        this.$message.warning("未选择任何选项");
        return;
      }
      let ids = this.multipleSelection.map(v => v.id); // [{}, {}, {}] => [1, 2, 3]
      this.request.post("/file/batch", ids).then(res => {
        if(res.data) {
          this.$message.success(res.message);
          this.load();
        }else {
          this.$message.error(res.message);
        }
      });
    },
    download(url) {
      window.open(url);
    },
    changeEnable(row) {
      this.request.put("/file", row).then(res => {
        if(res.code == 200) {
          this.$message.success(res.message);
        }else {
          this.$message.error(res.message);
        }
      })
    },
    handleSizeChange(pageSize) {
      this.pageSize = pageSize;
      this.load();
    },
    handleCurrentChange(pageNum) {
      this.pageNum = pageNum;
      this.load();
    },
    handleSelectionChange(val) {
      this.multipleSelection = val;
    },
    handleFile(res) {
      this.load();
    }
  }
}
</script>

<style scoped>

</style>